Function parse_execution_time 

pub fn parse_execution_time(time_str: &str) -> Result<UnixNanos>

Parse execution time string to UnixNanos.

Parse IB execution time to UnixNanos.

Supported IB formats:

• “20230223 00:43:36 Universal”
• “20230223 00:43:36 UTC”
• “20230223 00:43:36” (assumed UTC)
• “20250225-15:15:00” (assumed UTC)

Arguments

• time_str - The execution time string from IB

Errors

Returns an error if the execution timestamp is malformed or uses a non-UTC timezone.